45 lines
1.7 KiB
Ruby
45 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Database
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module Reindexing
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# Number of indexes to reindex per invocation
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DEFAULT_INDEXES_PER_INVOCATION = 2
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SUPPORTED_TYPES = %w(btree gist).freeze
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# When dropping an index, we acquire a SHARE UPDATE EXCLUSIVE lock,
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# which only conflicts with DDL and vacuum. We therefore execute this with a rather
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# high lock timeout and a long pause in between retries. This is an alternative to
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# setting a high statement timeout, which would lead to a long running query with effects
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# on e.g. vacuum.
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REMOVE_INDEX_RETRY_CONFIG = [[1.minute, 9.minutes]] * 30
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# candidate_indexes: Array of Gitlab::Database::PostgresIndex
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def self.perform(candidate_indexes, how_many: DEFAULT_INDEXES_PER_INVOCATION)
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IndexSelection.new(candidate_indexes).take(how_many).each do |index|
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Coordinator.new(index).perform
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end
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end
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def self.cleanup_leftovers!
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PostgresIndex.reindexing_leftovers.each do |index|
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Gitlab::AppLogger.info("Removing index #{index.identifier} which is a leftover, temporary index from previous reindexing activity")
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retries = Gitlab::Database::WithLockRetriesOutsideTransaction.new(
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timing_configuration: REMOVE_INDEX_RETRY_CONFIG,
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klass: self.class,
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logger: Gitlab::AppLogger
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)
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retries.run(raise_on_exhaustion: false) do
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ApplicationRecord.connection.tap do |conn|
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conn.execute("DROP INDEX CONCURRENTLY IF EXISTS #{conn.quote_table_name(index.schema)}.#{conn.quote_table_name(index.name)}")
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end
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end
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end
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end
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end
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end
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end
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